is it too much for me to ask for their lives ♪ ♪ sirens shake the earth doctors treat the hurt with our thoughts and with our prayers we unite ♪ ♪ there's nothing we could say that would make this all right 'cuz there's no magic way to erase and rewind to heal what's been broken and to mend what's been scarred it takes time we can't lose faith in mankind ♪ ♪ no-oo-oo ♪ heal what's been broken and to mend what's been scarred it takes time but we can't lose faith in mankind ♪

>> that was incredible. steffi jeraldo from the berke lee college of music singing her song for boston. that was wonderful. it brought tears to many people in the audience. now to the able hands of wolf blitzer in "the situation room." jake, thanks very much. happening now, new developments in the boston bombing investigation. authorities dig through a massachusetts landfill looking for a laptop. the fbi coming up with some new clues this hour. also extraordinary stories of heroism. a carjacking victim tells how he was held by the suspects for 90 minutes, threatened with death before a daring escape. an off duty firefighter tells how he helped save one of the youngest bombing victims. we'll hear from the man who noticed a suspicious figure only moments before his legs were blown off and still managed to

put authorities on the trail of the suspects. i'm wolf blitzer. you're in "the situation room." authorities today are literally digging for evidence in the boston bombing case. they've been combing a massachusetts landfill for a computer belonging to one of the suspects. let's go straight to cnn's brian todd in boston with all the latest developments. brian? >> wolf, this according to a law enforcement official familiar with the investigation telling our cnn's susan candiotti that investigators this afternoon have been searching this landfill in new bedford, massachusetts. this landfill is near the dorm where dzhokhar tsarnaev, the younger of the two suspects, stayed at the university of massachusetts at dartmouth. what are they looking for? according to this official they're looking for his laptop. they say that the official says both brothers are believed to

have detonated their devices, detonated the bombs with their own devices so they are looking for this -- through this landfill for dzhokhar tsarnaev's laptop and it could be a lead that could take them to maybe searching to finding the detonation devices or the detonation triggers for the bombs. this lead according to this official came from dzhokhar tsarnaev himself. in other details of the investigation today that we're getting we did see some video today for our first glimpse of the widow of the older suspect tamerlan tsarnaev. his widow catherine russell, we haven't seen her in days. we did catch a glimpse of her leaving her home in north kingston, rhode island with her attorneys. not clear what that's leading to but, again, this investigation moving along pretty rapidly, wolf w. the landfill search and possibly katherine russell meeting with her attorneys. we believe the attorneys have at least met once, at least once with investigators, wolf. >> what are we learning about

this mysterious misha, this supposed person who had this inordinate influence on the older suspect who is now dead, supposedly radicalizing him, an armenian who's converted to islam. what are we learning about the hunt for misha? >> according to this law enforcement official, wolf, who spoke with cnn's susan candiotti, they are looking for misha, working with overseas partners to try and track him down. it could be a clue as to where he might be. no specific mention of where overseas but they are working wi overseas partners to track him down. and they believe they are making progress on that front. >> when they say they believe they are making progress are they giving details, any specifics? because that sounds like they think they have someone in mind. >> they may very well have someone in mind, wolf. they are not giving details really much beyond that. just that they're working with overseas partners. giving you a clue that this man who has been so elusive to most

of us in the boston area who have been looking for him for the past three days that he has been very elusive. he could be overseas somewhere. officials not giving detail where they think he might be. of course that could be something that could give it away to him as well. >> brian todd in boston, thank you. it's been 11 days since the boston marathon bombings which killed three people and wounded 264 others. 30 of them of the wounded remain hospitalized. only one is still listed in critical condition. at least 14 people have undergone amputations because of their wounds. the wounded bombing suspect dzhokhar tsarnaev has been moved away from bombing victims. he's been transferred from a boston hospital to a medical center with bars. a federal bureau of prisons facility about 40 miles away. our national correspondent jason carroll is there. he's got the latest details. what are we learning, jason? >> well weerks can tell you, wolf, after speaking to a representative here that

tsarnaev was brought here just about 5:00 a.m. this morning from beth israel hospital. he was brought here because he's now in stable enough condition and is able to sit up. he is a lot more responsive than he was just a few days ago. he went through something called an intake screening process. it's a step by step process, brought here in handcuffs by u.s. marshals. we're told the first step of that process is he was strip searched. right after that he went through a medical screening. obviously once again in stable condition. more responsive now than he was before. he went through a psychological screening to make sure that he wasn't in danger of hurting himself. i'm told here by a representative here that the result of that psychological screening determined that he was not in danger of hurting himself. he was also fingerprinted. a dna sample was taken from him as well. and then he was photographed. then all of that material was given and turned over to the fbi. that entire part of the process, wolf, i'm told took just about an hour before he was then transferred to his cell. wolf? >> do we know who else is at

that federal prison there? i understand there are a lot of others who need medical attention psychological attention. what do we know about this facility? >> well, devens federal medical center is one of six here in the commonwealth of massachusetts. this facility can hold about a thousand inmates, all different types -- low risk to high risk. you can have sex offenders here, any type of offender can be brought to this facility if that offender is in need of medical care. when it comes to tsarnaev he has been moved to a special restricted section of the facility since he is a high risk offender, at least classified as a high risk offender. it houses about 30 individuals. he is held in a single cell. to tell you a little bit about that cell it has a steel door. there is a slot that food can go through. he has a shower in there, a small shower. a toilet. a small sink as well. and just from speaking to a

representative here at the facility, just about 15 minutes ago, he told me that they also go through particular rounds where they check on these individuals more so than some of the others. >> all right, jason. thanks very much. jason carroll on the scene for us outside that federal prison. let's drill a little deeper now on the transfer of the bombing suspect and on the investigation. joining us is our national security analyst tom fuentes. he is a former fbi assistant director. tom, we know the victims at that beth israel deaconess medical center certainly wanted dzhokhar tsarnaev moved but it's also important for law enforcement. explain. >> well, wolf, i think the u.s. marshals and the bureau of prisons would have wanted him out of there. the hospital is not geared up for that type of security on a continuing basis so the various fbi agents, marshals, and other law enforcement officials trying to guard him maintain his custody, keep a vigilante from coming in there and killing him while he is laying in his bed and just the protection of the

hospital, it was in everybody's best interests to get him out of there, get him in a medical facility that is part of the bureau of prison system and designed to be a hospital facility within a prison environment within a cocoon of security provided by the prison. >> yeah. they want to make sure that no one gets in there and kills this guy obviously. you've been involved in similar moves with other high profile criminals when you served in the fbi. that explains i assume why they decided to move him in the middle of the night. >> right. years ago i helped coordinate the movement of salvatore sammy the bull gravano from the metropolitan correction center in new york to quantico, first to the marine base brig and then over to the quantico fbi academy facility that was being remodeled to accommodate him if you will. but, yes. i'm familiar with the process of trying to get somebody moved. normally it would be in the

middle of the night. there's less traffic, less concern for being bottled up in a traffic jam where you're vulnerable to being attacked by somebody else, so it makes sense to move him like that in the dark, get him moved, keep him safe, keep everybody away from him. get him into the prison facility and then everything is much more secure from then on. >> much has been made as you know, tom, of the older brother who is now dead. tamerlan's trip to russia, whether he actually received military training. do you have any thoughts on that? >> my only thoughts are that so far the russians would have to be the ones to tell us that he received military training and they have not. and, secondly, i would question what kind of military plan they were operating under that says, perform this attack on monday afternoon at the boston marathon. hang around boston. go to class. go to parties. smoke marijuana. do what you want for three and a

half days where if there was an intention to go to new york as had been reported they have three days to get to new york, complete anonymity during that time. their pictures had not gone up on the internet or worldwide media coverage until thursday afternoon at 5:15. they had fully the rest of monday, all day tuesday, all day wednesday, all of thursday until 5:15 where they could have waltzed up and down times square and nobody would have recognized them as just anybody but a tourist. >> tom fuentes, thanks very much. tom fuentes the former fbi assistant director. up next here right before his legs were blown off, he noticed the suspicious figure. we're going to hear from the man who managed to put the authorities on the trail of the two bombing suspects. g bbm video with screen share. hey aleigh. hey! carol! update on 171 woodward..... let's other people see what's on your screen. and these are the material studies. the dog was my suggestion. aleigh. aleigh! it's great. but i'm on vacation

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seeing courtesy of our affiliate whdh. this is watertown, massachusetts just outside of boston. that was the boat, covered there with a tarp, that was the boat where the dzhokhar tsarnaev was caught and arrested the other night as he sought to escape the police. they're moving the boat right now. not exactly sure where they're moving the boat to. we're getting more information on this but i think it's fair to say they want to collect all the evidence and put it in a safe place as quickly and as thoroughly as possible. we'll continue to monitor this but, clearly, they're getting ready to move this boat out of the back yard of this individual, this home in watertown where dzhokhar tsarnaev was captured. it's become one of the most gruesome images of the boston massacre the bombing victim jeff bowman being rushed from the scene of the attacks missing much of both legs. he is also called a hero for helping authorities identify suspect number one and is

speaking out for the first time in a radio interview with weei's denison callahan morning show. >> i was with my girlfriend's roommates and having a great time, you know? we were watching the runners. everyone was having a great time. and just that one guy, you know, he didn't look like he was having a good time. he was right next to me at that point and he had a bag and he had his glasses. he had like a kind of like a leather sweatshirt type of deal and, you know, it was warm out. he wasdd guy. just struck me odd. and that's what i remember of him. and then the next thing you know, fireworks and i'm on the ground. >> so you actually looked this person in the eyes. you have sunglasses on but you made eye contact with him? >> yep. >> and immediately you knew there was something wrong. >> yeah. yeah. exactly. like he just didn't seem right.

you know? so, you know, like you size somebody up and i just looked at him and i was like what is this guy's problem, you know? >> yeah. how long before the explosion was that? >> you know, it could have been five minutes. it could have been two minutes. >> right. >> it was quick. you know? >> and i know -- >> he was there and then he was gone and then boom. >> are you thinking at that point you're going to make it? >> not really. you know, actually when carlos picked me up and threw me into the wheelchair, then i was like, all right. maybe i am going to make it. but before that, no way. i thought i was done. >> did you see what happened to you? were you aware of what had happened? >> yeah, yeah. >> how does your brain process that? >> i don't know. just toughed it up at that point. you know? i was definitely hurting but, you know, i was sad. >> i believe you were there for one day. you couldn't talk. you had tubes coming out

everywhere. you were in real pain. you asked sully for whatever, a pencil and paper and started writing and sully was saying his hands just started shaking. i mean, i know you're not comfortable with this. i know you are a humble, quiet guy. that was the first big break on the case. tell us about. >> well i was still conscious. i was being transported from the blast site to the hospital. and the whole time i -- when i was in the hospital i was given descriptions of the guy, the first guy, the guy with the hat and the glasses. the aviators and the 5:00 shadow. >> tamerlan. suspect number one. >> yes. i was real out of it -- coming out of the first operation i

guess. yeah. the fbi was all around my room. they were there from the moment i was talking right when i got to the hospital. >> and was it -- was the sketch artist ever brought in so they actually drew a picture or they just took your description, the words of your description? >> yeah. they -- well, for the first suspect i think they just took the description but then there was -- then i think they saw the second suspect and on like wednesday they had a sketch artist in. >> so he drew a picture. did it look like the guy we now know is suspect number one? >> yeah. it looked just like him. >> the doctors, jeff, outlined what the next, i don't know, couple month are going to be like for you in this process? >> yeah. just a lot of getting my upper body strength. i'm going to -- all physical training, you know, occupational training and i'm going to try to get my hearing back.

my hearing is shot. i can't hear for anything. >> what about when they got him? what about when you found out that the guy you saw was run over, literally, by his brother? >> yeah. i mean, what i thought was -- still here. you know? >> you don't sound angry. you don't sound pissed off. can i ask you what your feelings are about the men who did this to you and so many other people? >> yeah. i'm pissed obviously. >> yeah. >> but, i mean, it's in the past. you know? you can only look forward. i had a lot to look forward to before and i have a lot to look forward to and live for now. >> amazing young man. if you'd like to help jeff bauman with his recovery and i hope you do, you can go to go fund me.com/bucks for bauman. good idea. coming up, 90 minutes of

fear. a carjacking victim tells how he was held by the bomb suspects and threatened with death before a daring escape. we'll hear from a family badly scarred by the boston bombings. three of them wounded at the finish line. >> suddenly there was this loud explosion, which to me sounded very metallic and almost like had an echo to it. ♪ [ male announcer ] the first look is only the beginning. ♪ ♪ this is a stunning work of technology. ♪ this is the 2013 lexus es

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an unbelievable find in new york city today. parts of a landing gear which appear to be from one of the commercial airliners destroyed 12 years ago during the 9/11

terrorist attacks have been discovered wedged between two buildings in lower manhattan. cnn is on the scene in manhattan. what do you see and what are you learning? >> reporter: well, it is a very interesting scene down here. it's a beautiful day in new york city and any day when armies of tourists sort of pile on a block you wond whaer's going on and people can't believe what is going on here. there is an officer standing outside of an alley. there is a cross street behind 51 park place here and that is the space where the landing gear from one of the planes from 9/11 was found. i have to say, it's not often that new yorkers stop and want to know what going on. this is a very big city. but people are in sort of shock down here that this piece of such a day in our country in new york city was found here this morning. >> and how did they come upon it? what were the -- what was the

background to the discovery of this piece? >> well, it is believed that one of the neighboring buildings, which ironically, wolf, is eight blocks from here that caused so much controversy two years ago when it was being built, people didn't like it being so close to 9/11, but was believed to be the case that one of the neighbors saw something in an alley way and called police and it is verified this morning. it can't be removed from the scene yet until medical and people get on the scene and see what is going on and determine it is a safe and healthy work environment. the piece of equipment is actually still here. like i said, people are just walking by in disbelief. you can't see it from the street. it is in a crawl space. as you see we have some photos of what it looks like. >> cnn's raelyn johnson on the scene for us with a dramatic discovery in lower manhattan. thanks very much. up next, 90 minutes of fear.

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looking at live pictures now courtesy of our affiliate whdh. this is the boat where they found dzhokhar tsarnaev hiding out under a tarp. it is now being moved from that back yard of that home in watertown, massachusetts just outside of boston. you see it is being towed there through the streets of boston. people are watching the boat being towed not thinking too much about it but it is getting security. you see police officers, police cars blocking intersections as they're moving this boat. we assume it is going to some sort of warehouse. some sort of facility so they continue to inspect it. continue to collect it. part of the evidence in this criminal investigation. but you see th the streets of watertown, massachusetts.

that's just outside of boston. our affiliate continuing to watch this move several days after dzhokhar tsarnaev, the 19-year-old suspect was found underneath a tarp in that boat, a dramatic moment obviously in this entire, entire saga. there are some pictures of what they saw when they discovered him in the boat finally coming out. the person who lived in that home saw some blood, called 911. the police came over. they discovered him hiding out in that boat. now that boat is being moved to a different location. we'll find out where it's going. we'll update you with more as it becomes available. you can see that boat being towed through the streets of watertown right now. for 90 minutes he was allegedly held prisoner in his own car by the bombing suspects and was threatened with death. now a 26-year-old chinese entrepreneur wants to be identified only by his american nickname, danny. has told his harrowing

experience, exclusively to the boston globe. boston globe reporter eric muskowitz spoke with cnn's john berman. >> what stuck out to me is danny really has probably of all the millions of people of greater boston the perfect combination of innocence, poise, and calm. if it had been almost maybe anyone, any one of us or a little different twist here or there danny wouldn't have survived and the brothers would have gotten on to new york. it is really an incredible story. danny is an amazing guy. >> reporter: 90 minutes he spent in that car with one or both of the brothers at different times. how did he manage to escape? >> take it back to the beginning. first of all it starts with danny stopping his car to send a text message. if you question if anyone actually does it, it's danny. they pull up behind him. the older brother gets out, raps on the window. he doesn't hear it and lowers the window. tamerlan opens the door, pulls a gun on him. takes what money he has and tells him to drive. the other brother is following

behind. they go and consolidate what danny thinks is luggage but is actually the bombs from their car to his car. they drive around 90 minutes constantly threatening him and danny is trying to think how do i stay alive? don't want to say the wrong thing. at one point he gets a text message from his roommate in chinese saying where are you? how come you haven't come home? tamerlan takes an english to chinese app texts back i'm sick. i'm not coming home tonight. i'm with a friend. that seems weird to danny's roommate. there is another text, then a call. there is silence in danny's car. they don't answer. tamerlan says you answer. if you say a word in chinese i'll kill you and don't be stupid. so danny says, answering to someone talking to him in mandarin in english, i'm sick. i'm with a friend. i'm sorry. i've got to go. he is trying to think where can i get out? when is my moment? lucky for danny the car was running low on gas. they had to stop at a gas station. double stroke of luck it wouldn't take the credit card. the younger brother has to go in

and pay with cash. that leaves danny alone with tamerlan. think about tamerlan. he's been on the run all day. he killed an m.i.t. police officer five hours earlier. he puts his guard down for a second, puts the gun in the driver's side pocket of the suv and has both hands fiddling with the gps and danny realizes if i'm going to get out now is the chance. i have to unbuckle the seat belt, open the door and go in one swift motion. at a certain point he stops thinking and does it. it is the perfect place. he goes between the car and the gas pumps and if tamerlan is going to shoot him he'd have to go through the window like an impossible shot. he tries to reach for him. can't get him. he hears him curse. sprints across the street to safety at another gas station and calls 911. >> they were able to trace the car using his cell phone and the mercedes satellite technology. this man danny may have saved lives. he certainly helped catch the suspects here. >> absolutely. this is, take you back last thursday, early friday morning, just after midnight, it was only a matter of minutes between when the police got to danny and when

they caught up with the tsarnaev brothers. without danny's cell phone and his poise, without the satellite technology in the car, who knows how long it could have taken them? >> what does danny say the brothers said about new york? >> two things. when i spoke to danny they were speaking english. when they spoke to each other it was a language danny didn't understand. he is trying to listen without making it clear he is listening. tamerlan said if you look at me and see my face i'll kill you. danny very wisely said i didn't see you. i don't remember you. he is trying to hear him and hears the word manhattan come out in this language he doesn't otherwise understand. that gives him an indication they might be going to new york. then they ask him can your car go out of state? he doesn't know what to make of that question so he said what do you mean? they mean like new york. so he says, yeah, yeah. my car can go out of state. >> speaking to our john berman. next hour by the way cnn's brian todd will show you where that 90-minute ordeal happened step by step by step. stand by for that.

just ahead here russian authorities carry out a massive sweep aimed at radical islamic groups. is there a link? is there a link to the boston bombings? also coming up, you'll hear how members of one family were wounded at the marathon finish line. xt big thing, isn't a thing at all? it's lots of things. all waking up. ♪ becoming part of the global phenomenon we call the internet of everything. ♪ trees will talk to networks will talk to scientists about climate change. cars will talk to road sensors will talk to stoplights about traffic efficiency. the ambulance will talk to patient records will talk to doctors about saving lives. it's going to be amazing. and exciting. and maybe, most remarkably, not that far away. the next big thing?

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dozens of people are detained as russian security services carry out a sweep targeting islamic extremist organizations. so here is the question. is there a possible connection to the boston bombings? let's go live to our senior international correspondent nic robertson joining us once again from dagestan.

that's in russia. what's going on here, nic? what are you hearing? >> wolf, a big sweep by russian security forces. 140 people attend a mosque in a southern moscow region. they say that they were targeting people there with ties to radical islamist organizations according to the security services. they say people who attended that mosque have gone on in the past to be involved in preparing and carrying out what they described as terrorist activities in the north caucuses this region of russia where we are at the moment. there is no indication we have so far there are any direct connections to the boston bombing. however, some russian news organizations are saying 30 foreigners were picked up in this operation, wolf. do we have any clue whether or not tamerlan tsarnaev, the 26-year-old who is now dead, one of the boston bombing suspects,

when he was there in dagestan, what, for six months last year, did he visit this area? did he go to that mosque? are they saying anything about any of his stay in dagestan connected to these activities? >> reporter: so far, nothing direct on that connection. what we do know is that the mosque that he attended here in dagestan is one that has a radical reputation as well, that it was somewhere -- the security services already were watching this. they did have concerns with it. we know a large amount of his time here in russia was unaccounted for. but we don't know if he attended that particular mosque. >> nic robertson, thanks very much. just lost that connection at the very end. nic is in dagestan. when we come back, a family of three suffers everything from shrapnel wounds to a lost leg in the boston bombings. their first-hand account of the power of those blasts just ahead.

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the marathon bomb blasts have left lots of permanent scars on three family members. standing near the finish line that horrific day. the most severe, a husband and father who earned a purple heart for his service in vietnam. now coming to terms with losing his leg in a place that was sohn berman spoke with but a

him. >> on my arm is where they pulled out the biggest chunk of shrapnel right there. then i have all of these little bb marks all up and down here and all over here. you see all these round welts. then over on this side there's more. then there's all up through here is where i really got hit the hardest. so it's interesting because when i went to the hospital some of these, they actually had the round pieces of metal in them that looked like bbs basically. always have them to remember i guess. >> some memory. >> yeah. >> so 2:50 p.m. in the afternoon. >> yes. >> on marathon monday. what happened? >> well, you know, from what i recall, we were close to the finish line and kind of meandering, stopping, starting, stopping, starting, and suddenly there was this loud explosion,

which to me sounded very metallic and almost like h an echo t it. and i saw this huge flash of light, blinding, and then just dark. >> this is a picture right after the race. show me where you are. >> i am right here. i kind of got blown away from the blast by about five feet. my father is in the red right here laying down and myother is right next to him over him and you can see the blast happened right around there. >> mary jo, i have to say, it had to be fterrifying. >> the sound was just unbelievable. that was the -- just like you were in another world. >> and then the uncertainty, not knowing for hours. >> yeah. >> that was the hard part. you know, not knowing where they were and calling around and trying to find updates and just being kind of helpless and powerless. that was difficult. >> the explosion goes off and what happened to you?

>> it was the explosion and our clothes were torn off. and i could not find kevin at all. my husband bill was on the ground next to me. but i didn't know where kevin was. i couldn't see him. >> this was in your -- >> in my purse. >> in your purse. what happened here? >> yes. i won't be making any check stubs. >> a piece of shrapnel right through it? >> yeah. >> and you had a broken wrist? >> i have shrapnel in my left leg and it was in my face. and just a small break in one of my hands. >> tell me about your husband. >> he's doing remarkably well. >> he's in good spirits? gin his condition. and healthwise, the doctors are astounded at the progress he's made. >> after everything that's happened, are you bitter at all,

angry? >> i'm -- not really. you know, it's one of those things that it was so unpredictable and one minute earlier, one minute later, it might not have happened. so it's really hard to -- i'm speaking for myself. obviously my father, his condition is much more serious. but i don't sense that he's very bitter or angry. >> served in vietnam many decades ago. came home okay. this is what happened at the of the boston marathon. if you'd like to help the white family, with their recovery, visit their online fund at www.you caring.com. when we come back, he was the youngest victim to die in the boston attacks. up next you'll meet the heroic firefighter who helped save the

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just seconds after the bombs went off at the boston marathon, an offduty firefighter having lunch oot a restaurant nearby sprang into action. he had no idea he would come face to face with the youngest victim to die in this tragedy. 8-year-old martin richard and his sister jane. here's what he told our anderson cooper. >> it's really the second blast that you realized -- >> yeah, second blast. i immediately started running towards the front, yelling for people to get back, get to the kitchen, get away from the windows. not pushing people back, but at the same time i was making it known i was going forward and they were going the other way. i get out to the patio, and i don't know if it was just tunnel vision or fate or whatever it was, but i just looked and focused, and just saw this one

child in the middle of the street, just sitting there with this dazed, shocked look. even from where i was, i could tell this child was hurt. >> you could see her face. >> yeah, i could just tell. i don't know if it was tunnel vision or what, i just zoomed in. call it training or intuition, whee whatever, something was wrong. it is pandemonium. once you get something in your mind and once you focus on it, like that's the task at hand. i don't know if it's training or fact that i was distracted by just this one child, but it had my full attention. >> you ran over to the little girl -- >> i ran over to the little girl, who i initially thought was a little boy. i knelt down, expressed matt, i'm here to help you. i'm a paramedic. you're going to be okay. >> she was with her father? >> she was with her father and older brother. neither one of them looked injured. the reply i got back i thought

was shane. turned out it was jane. the answer was irrelevant. the fact that she could speak meant she was conscious and alert and knew what was going on. she looked in a state of shock. she just hadhis emotionless look. i only remember her saying once or twice that, her leg hurt. >> was she crying? >> no. no crying. she looked me straight in the face and answered the question. what's your name? it turned out to be jane. u can imagine with the cos and noise, shane, jane, it was -- >> what did you do first? >> well, once she spoke, i realized that was good. i looked down and realized she had a full left leg amputation. i got up and ran back to the sidewalk. there happened to be a j standing there. i said, i need your belt. without hesitation this man ripped off his belt and gave it to me. i ran back over, applied a tourniqu tourniquet. started looking left, right,

knew i needed to get this child moved. she was in serious condition. >> it was critical to get the tourniquet on. >> the tourniquet was crucial. without the tourniquet, she would have bled out. >> how quickly can someone bleed out? >> a child that size, it varies on the injuries, and if the wound caughterizes or an artery, but 30 seconds to a minute, a child that size. >> you got the belt and ran back. >> after the tourniquet was applied, another gentleman who i later found out, michael chase, great guy, ran up to me, asked me what he could do. i said, we have to move this kid. this child needs transportation. and medical help. like a doctor. i heard the familiar sound of oked up and down boylston street and saw two fire engines and medic truck coming towards us. immediately scooped up the child. i said don't let go of the tourniquet. we ran in unison down the street, with the father and son following. didn't notice -- michael ended

up standing there talking to them to calm them down. >> you're running, holding jane -- >> and michael is holding the tourniquet on. just to keep it cinched down. it's a belt, not ddor that kind of pressure. he had to run with me. his job was to hold the tourniquet and i was just supporting her weight while he held that on. it was crucial. like without him or i, it wouldn't have worked. it couldn't have been done with one person. you needed both of us to be there at that time. and able to do what we did. ran back to the scene. again, i get upon another child that i see cpr is in progress. i didn't know who was doing i get up to the child and notice it's a boy. couldn't have been more than 8, 10 years old, small child. severe injuries as well. lower extremities. and abdominal. so i moved my way to the head. at this time there's some medical presence on scene.

i administered two breaths to the child. let the cpr go. two more breaths to the child. checked for a pulse. there was no pulse. i knew at that point that, you know, it's never a lost cause with a child or anything like t depending, and especially in that situation with the amount of injuries and severity of the injuries, that there was nothing that -- there's nothing more we could do for this boy. >> that was martin richards? >> that was martin richards. that's the boy we tried to save and ended up having to just, you know, triage and move on to someone else that could be saved. >> that was jane's brother. >> that was jane's brother, yeah. >> what's that like to -- i mean, to -- you're with these people in the most horrible moment, in this intimate moment. and to not even know who they are, and then to see on television the picture of the little boy when he was alive. >> during the event and the tragedy, you don't really have a connection. and it's not personal. i don't mean to sound like that we don't care, because we do.

but it's a very -- >> you've got to be focused. >> it's a very methodical, this is what i have t do, this is who can be saved. you have to assess each injury, each victim separately. and without bias. it's purely based on, what can i do to save this person's life, or help, and can they be saved. >> have you been able to talk to the family? >> no. >> is that something you'd ultimately like to do? >> ultimately, it's up to the family. the family has suffered more in a day than anybody should in a lifetime. but i'd like an update. i'd like to know we did make a difference. it's one less person they didn't get. and one less life that wasn't robbed. >> you saved a life. >> yeah. and that's ultimately what it's about. you know, you just happen to be in a really bad situation, but you were there. you were put there for a reason and you had the knowledge, and, you know, the guts or whatever you want to call it to run in there and make a difference.

>> you just became a medic. >> i did. >> i'm very glad you became a medic. >> me, too. >> thank you. >> hey, thank you very much. appreciate it. >> thanks. >> thankfully he did become a medic, thanks to anderson cooper as well. if you would like to help the richard family with their recovery progress, visit richardfamilyfund.org. happening now, a frightening account of being car jacked by the alleged boston bombers. with new details from the victim. we'll retrace his nightmare and his life-and-death escape. plus, we'll take you inside the prison hospital where the surviving suspect is now being treated behind locked doors. and a bombing survivor talks about the shear panic of that day and her dangerous jump to safety. she's injured, she's shaken, and she's angry. i'm wolf blitzer. we want to welcome our viewers in the united states and around

the world. the world. you're in "the situation room." -- captions by vitac -- www.vitac.com let's get to breaking news right now. you see authorities are hauling away the bloodstained boat that was the final hideout of boston bombing suspect dzhokhar tsarnaev. these are taped pictures, only moments ago. you can see the boat being moved away from the home in watertown, going into the street. it's been one week since police captured the younger tsarnaev brother in someone's backyard in watertown. that's outside of boston. he was hiding under a tarp in that boat, and now that boat is being moved. another breaking news detail we're following right now. sources are telling cnn one of the explosive devices found at last week's gun fight between police and the boston bombing suspects in watertown was made with a metal elbow pipe.

that's similar to the design in the al qaeda online magazine "inspire." a separate source also said the pipe was wrapped in black tape. investigators have been saying for some time that the instructions in that al qaeda and arabian peninsula magazine "inspire" is they are available in that magazine. they teach people how to build a bomb. now, a new account of 90 terrifying minutes when a man named danny says he was trapped in his car with the boston bombing suspects fearing he would be killed literally at any moment. dann is now telling his story of being carjacked at gun point and all the harrowing turns. he fills in the critical gaps of the timeline of the manhunt for the tsarnaev brothers. cnn's brian todd is in boston aahow itall played out. brian? >> wolf, this is the area where the carjacking began along this

strip of brighton avenue outside downtown boston. a week ago thursday night, it began with suspect tamerlan tsarnaev pounding ong the victim's car and demanded a ride. it left the victim shaken. tamerlan tsarnaev wielded a silver handgun when he climbed into the black per sad december suv. the suspect's first words. >> he said, did you hear about the bombing, the marathon bombing? i said, i did. he said, well, that's me. i did that. and i just killed a cambridge cop. >> reporter: a krimologist at the university counseled the victim and knows every detail of the story. the victim, a cnese national, did not want to go on camera, but only agreed to be referred to by his american nickname danny. he gave a description of the carjacking to the "boston globe" which professor fox confirmed to cnn. the victim said when he pulled off the curb with tamerlan in the passenger seat, dzhokhar was following in another vehicle. it was hard to drive at first.

>> early on in the drive, danny is obviously quite nervous, and driving somewhat erratically because of his nerves. and tamerlan said, oh, relax, calm, drive slowly. >> reporter: they drove from brighton to watertown, into cambridge, about 90 minutes in all. we retraced the route. at one point, professor fox says, the two vehicles pulled over. the brothers got out and unloaded objects from dzhokhar's vehicle into his trunk. >> he thought it was luggage. >> reporter: they ditched dzhokhar's car. they were three in danny's vehicle. >> he realized at that point, boy, he may not live to see another day. >> reporter: tamerlan was then driving, the victim in the passenger seat. dzhokhar in back. they stopped at an atm in watertown, withdrew money from danny's card. >> in the car, the three of them are talking like normal guys.

and they had over 90 minutes to spend with each other, and they were talking about ordinary things, what kind of phone do you have, do you have a cd player in the car. there was this kind of a relationship forming, which in -- eventually aided danny. >> reporter: but at one point danny's phone buzzed with two texts, then rang twice. >> danny answers it. tamerlan says, don't say a word in chinese, if you do, i'll kill you. so his friend is speaking chinese over the phone but danny answers in english. i'm going to sleep elsewhere tonight. and when he finally hung up, tamerlan said, good boy. you did it well. >> reporter: professor fox said the brief window for escape came at this shell station. cash only at the time so dzhokhar tsarnaev went in to pay cash for the gas. at that point tamerlan tsarnaev was briefly fumbling around with his personal gps system.

he said tamerlan set the gun down temporarily inside the door pocket. >> in one motion, danny undid his seat belt, opened the door and ran to the rear of the car, across the street to the mobil station. >> how did tamerlan tsarnaev react? >> tamerlan tried to grab him. missed. swore. that was it. >> didn't fire? >> didn't fire. it would have been difficult to fire, because danny, by this time, was to the rear of the car. and it would have been difficult for him to sort of fire through theack window. >> reporter: at the mobil station the victim got an employee to call 911. the tsarnaev brothers took off. the encounter with police in watertown came soon after, when tamerlan was killed. professor fox says, given the information that the brothers planned an attack in new york -- >> were it not for his actions, his behavior, his composure, his witsz about him, who knows what would have happened. >> reporter: professor fox said

the victim doesn't consider himself a hero and is still nervous because he knows he may well have to recount the entire episode in court if and when dzhokhar tsarnaev goes to trial. >> thanks very much, brian todd, an excellent report. dzhokhar tsarnaev is now locked up in a federal prison facility. authorities say he was moved around 3:30 a.m. this morning from a hospital in boston, to a prison medical center, about 40 miles away in devens. it's on the grounds of a former u.s. military base. a law enforcement source telling cnn tsarnaev has been able to sit up, and that he has now been actually writing. it's not clear what he's writing. cnn's tom foreman is joining us to give us a virtual tour of this prison facility. what's it like, tom? >> hi, wolf. as you point out, geographically it's only about 40 miles outside of boston, the devens facility. run by the bureau of prisons.

half a dozen buildings, as many federal facilities are. a spartan affair. this is the perimeter around it here. not a huge amount of overwhelming security as you would expect in one of the supermax facilities. nonetheless, this is the basics of the place. there are about 1,000 patients here. we use the word patients in particular, because the point here is this offers care to inmates who have long-term or chronic medical conditions. that's a fundamental reason for it. it is an all-male facility. there have been some famous inmates there, for example john fransase, both men involved in mob crimes. raj rajaratnam who was involved in a ponzi scheme. a library there, where at most an inmate can have five guests at a time. closely monitored. they can come between 8:30 in the morning and will later in

the afternoon. again, the fundamental purpose of this facility is for chronic conditions. we'll have to see if tsarnaev is there because he has that for a long time or this is merely a stopping point before he's moved on to some other place. wolf? >> he's listed in fair condition right now. tom, thank you. let's bring in our chief medical correspondent, dr. sanjay gupta. sanjay, what do you know about the prison's medical capabilities? >> well, you know, bouncing off what tom was saying a little bit, this is sort of more of a stop for him as opposed to treating some sort of chronic condition. it's a medical facility that has 24-hour care. they have six doctors for those 1,000 patients tom was just talking about, 60 nurses. they can do things like dialysis and x-rays. but they don't do big operations. they're not accredited for an icu. it gives you the idea of the level of care. not like where he was by any means at the beth israel hospital. but a lot of care still

available there. he also went to an intake screening process when he gets there, where he gets a psychological evaluation, he gets a medical evaluation as well, fingerprinted, dna samples taken. that's already been done. but it's a pretty good medical care for somebody who's this far out from his injuries, and operation, wolf. >> what does tsarnaev's transfer suggest about his condition? >> one of the things you think about, in someone who is in his state, fair condition they call it, could he still develop another medical problem, could he develop an infection, for example, that might require more advanced care. what this transfer tells me is because they're not accredited for an icu, because they don't do major operations there, they don't really think those things are going to happen. fair condition, it probably suggests he's continuing to improve. that would be the normal course, wolf. >> the suspect in this bombing case clearly spent almost a week

in the same hospital, beth israel deaconess medical center in boston, same place that some of the victims are recovering right now, as well. how common is that? >> you know, it's common -- you know, this does happen at big urban trauma hospitals. in big cities. obviously this particular situation, wolf, very unique, given the nature of these crimes. but yeah, you know, you do have suspects and victims in the same hospital, the suspect is usually restrained, maybe even handcuffed. there are guards, oftentimes medical teams that are taking care of the different patients, they may not be communicating specifically. they may be on different floors. so it does happen. again, the situation is very unique in some ways. but if you have a big trauma center in a city, oftentimes it will take lots of patients, both suspects and victims, wolf. >> thank you very much, dr. sanjay gupta. the tsarnaev brothers' brutal beginning. cnn takes you to the war-ravaged

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the roots of the boston baunlings could lie thousands of miles away in chechnya. we traveled to a town where the tsarnaev family lived. we're joined now from neighboring dagestan in russia. nick, what did you see in chechnya? >> reporter: wolf, one of the things that stood out in the week here, something that the aunt said that the family went back to chechnya, between the two chechen wars, trying to make a life there, but fled at the onset of the second chechen war. the second house where they lived having been bombed. we tracked down that particular town. heading into chechnya, you feel

the weight of two brutal wars. for an independence moscow would vealw. its ruins rebuilt over the only upside of the kremlin's heavy hand. the tsarnaev family's identity was forged here. we found their hometown, what's left of the family home. in its ruins lie the brutalized past the brothers must have grown up with. tamerlan fled this town when he was about 11 before the second war began. and this street was bombed. it's hard to be a chechen without a tie to your homeland, and these ruins bombed out in the first chechen war. what's left of the family home, of the father to the alleged boston bombers. their great uncle remembers a devoutly religious tamerlan. >> translator: they were this big, but i didn't see them after that. and they weren't involved in that crazy stuff. >> reporter: i show him

tamerlan's picture from online. transport that's him, that's tamerlan probably. he didn't live here, so i can't say. >> reporter: the americans say he's behind the boston bombings. >> translator: i saw them on tv. they said he was dead. he looks good there. but i saw him on tv like this. and that's it. >> reporter: since the war's intense repression inside chechnya, it pushed the violence across the region into dagestan. it killed a militant whose video tamerlan posted a link to, a common place. police call them bandits, using jihad as a cover for criminality. this video police say shows them cutting the throat of a policeman in his home. the west sometimes and other sites as they train and recruit in the words, chechnya's wars begat a cycle of violence, that

doesn't stop, just spreads. wolf, we're getting a picture of a man, tamerlan tsarnaev, formative years, probably 11 or 12 fled the violence in chechnya. later in his youth, in his 20s, comes back to dagestan and attends a mosque here, authorities say, is linked to extremism. that militant you just saw was also known to frequent, wolf. >> any word, nick, on whether the parents are still planning on coming to the united states? i know there was talk that the father was going to come. but what's the latest you're getting? >> reporter: when i spoke to the mother this morning, she was quite clear that trip is on hold simply because the father is not well at the moment. his health has taken a substantial turn for the worse. they have left dagestan and gone somewhere else in russia to get away. i think from the glare of the media, to get less pressure from the investigators perhaps as well. and really, i think the health

is a key issue at the moment. she still wants to go. she talked about the need to get the burial happening, once the officials in the sufficient sign release of the body. it's on hold until the father's health improves. >> excellent reporting, as he's been doing all week. thanks very much, nick is in dagestan. the russian president, vladimir putin, speaking out about the boston bombing investigation. and of what he calls his, quote, great regret. plus, new bomb detecting technology. will it make bomb-sniffing dogs obsolete?

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russia's state news agency is reporting 140 arrests at a crackdown on the islamist extremist organizations. police say the mosque has drawn radicals including some of the north caucuses. the russian president, vladimir putin, spoke out about the attacks and the investigation today. our foreign affairs correspondent jill dougherty who spent many years as the bureau chief in moscow, is fluent in russian and working this part of the story for us. jill, what did they say? >> reporter: you know, wolf, i remember when i was a bureau chief in moscow, we had a roundtable with vladimir putin, and you could really see how even the word chechnya seemed to infuriate him. after all, he is the president who launched the second chechen war in 1999. and in his annual call-in

program which he had just yesterday, fielding questions from russians, you could see that his mantra really was, i told you so. he said, western partners in the media would hardly ever use the word terrorist when it came to chechens, that they would use instead the word insurgents. he accused the west of providing them financial and political assistance, and also said that much of what the west said about wanting to cooperate on anti-terrorism was really just empty words. >> translator: we always told our partners, instead of general declarations, you should have closer koom er cooperation betw security services, and now these two criminals confirmed we were right. >> reporter: he said also that he does want to cooperate, more closely with west, with the united states on fighting terrorism. and he had a specific comment about that information, the tip that the fsb gave to the fbi,

and to the cia about the tsarnaevs. he said the russian special services, to my great regret, were not able to provide our american colleagues with information that would have operative significance. interesting comment by mr. putin. you know, wolf, one of the complicating factors here is that the west for years has accused russia of carrying out that war against the chechen terrorists with a lot of brutality, and violating human rights. so although right now the fbi and the fsb cooperate on many levels about a lot of different things, some officials here say that might have colored a bit how they approached that information that did come from the fsb. >> that's a good point indeed. jill, thanks very much. still ahead, a bombing survivor talks about her frantic escape from the scene and the horrors she faced when she arrived at the hospital. what if the bombing suspects had been able to get to times square in new york.

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happening now, a bombing survivor's escape from the scene of the attack. her emotional account of seeing the blast, panicking and making a dangerous jump to safety. plus on the lookout in new york, would police cameras have spotted the tsarnaev brothers if they had made it to times square. and our bomb sniffing dogs becoming obsolete? we'll show you the new technology that could replace them. i'm wolf blitzer. you're in "the situation room." boston bombing investigators have been searching for potentially crucial evidence in a landfall. that's one of the new developments in the case. a law enforcement source says they're looking for dzhokhar

tsarnaev's laptop and other clues. we're told dzhokhar gave information that helped lead them to the dump of the university of massachusetts, at dartmouth where he attended classes. tsarnaev was moved from a boston hospital overnight. a source says he now can sit up and actually has been writing. tsarnaev's final hideout is being hauled away. we believe authorities are taking the boat where he was found one week ago to an fbi facility. for many survivors of the boston bombings, the fear and anger very, very fresh. including for ryan mcmann who was injured jumping to safety. and ryan is joining us now. ryan, thanks very much. what can you remember from that day? i know you were in the grandstand watching the race. what happened? >> we went up to kind of the, you know, the back of the grandstand area, and just were watching and enjoying

everything. i took videos. i was taking photos. just really -- i was incredibly inspired by all the runners, kind of grabbing their kids at the finish line, right before it, and running that last little bit with them. and just looking at each other, really enjoying the day. and then there was the blast. the first blast was directly across from us. and i just looked at one of my friends and she was just like, we've got to get out of here. i know my initial reaction was that it was not a bomb. i just looked at it and it was like, that's really large for an electrical blast. but the second my friend said, let's get out of here, we just started kind of moving to the left, like straight across the bleachers. and then the second blast went off. and at that moment, i totally

panicked, and everyone around me was completely panicked. i remember looking kind of down between the bleachers and thinking i could make the jump. i could -- you know, i could climb down, and there was nobody below us, so we could kind of get around all the crowds and just get the heck out of there. so i tried to do the jump. i was holding on to a bar, and one arm on the bleacher. and basically, because i was panicked, and with everyone kind of running around on the bleachers, i lost hold and fell and landed on my back. i looked up and my friend was about to do the same jump. i yelled up to her, told her not to do it. because i knew i had hurt myself.

but she did it anyway and she was able to hold on for a little longer, so she was okay. but the second she landed, she was like, ryan, you've got to get up, we've got to go. and my other friend was able to get down and climb down another way. and so we all just -- i have no idea how i got up, because i knew i hurt my back and my right hand was kind of crooked. we just ran. >> did you understand how seriously injured you were? >> no, i didn't. i thought i broke my arm. that, i knew. i knew i hurt my back but i figured since i was able to walk and run, it couldn't have been that bad. i just knew i wanted to get out of there. i didn't know how many, you know, more bombs could go off in that area. we just wanted to get far away. and when i got to boston medical, no one was there yet. i was one of the first people to come in. and they kind of -- they got me

quick in there in the reflt. then everybody started coming in. and that was just -- that is kind of what i'm processing now is like that scene, and seeing everyone coming in. >> how difficult is that? how difficult are those memories? >> those are hard. i'm still processing it. but, you know, the team there, they took care of me. everyone was so, so nice. and then i learned when i was in the e.r. that, you know, i had severely broken my right wrist, and then they came back and they're like, okay, your left wrist is broken and you fractured your back. just a lot of information, but i was just so, so -- i'm so fortunate. i'm so lucky. >> i know you're staying with

your grandmother now. what are they saying about your treatment, the recovery, and of course, all of us hope that there will be a complete and full recovery. how long is this going to take? >> they say -- well, they say anywhere from six months to a year. but i'm just amazed by how fast my back -- my body is, you know, seems to be healing. i'm hoping it's much less. but i'm going to have a full recovery. and i'm so lucky. >> you are going to have a full recovery. you have every right to be angry about what happened. how angry -- are you still very angry today? >> i have mixed feelings. i am angry, but it changes every day. how i feel about all of this. i just don't understand it. and i don't think i'm ever going to understand it.

i know when they caught the bombers, i sent a lot of angry texts to all my friends. and there were a lot of -- i felt a lot of anger. i know in the first few days i was just so angry. i just didn't understand -- i still don't understand it. i know i'm not probably ever going to understand this. >> we wish you, ryan, only the best. a complete speedy recovery. you have a lot of friends, you have a lot of supporters, people are watching you, they're with you every step of the way. we wish you only the best. thanks so much for sharing this powerful story with our viewers. >> thank you for having me on here. thank you. >> wonderful, wonderful young woman. up next, was the surviving suspect read his miranda rights too soon? what impact will it have on the

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new concerns are being raised about dzhokhar tsarnaev's interrogation and whether it was handled the right way. federal investigations questioned him for about 16 hours after his capture last friday, without reading his miranda rights. they took advantage of an exception to the miranda warnings when public safety is threatened. but on monday, the judge who conducted a hearing in tsarnaev's hospital room did read him his rights.

the chairman of the house intelligence committee, mike rogers, told me that created a huge problem. >> that is highly unusual for a judge to intervene so hastily and make the decision not based on the facts of the interviews, and the public safety exception, but what they perceived was happening based on what they saw on television. it's dangerous. it's precedent setting that i think we need to change and correct right away and we still need more answers on this particular question. once they walked into the hospital room, and offered the lawyer and mirandized, they hadn't -- as sure as i'm standing here right now, the subject has not continued to cooperate with the authorities. that's a huge problem. >> let's bring in our senior legal analyst jeffrey toobin for analysis. what's your reaction to what mike rogers is saying? he's saying they rushed to charge him, hastily read him the

miranda rights, when the questioning could have continued to help the public better appreciate the safety problems involved. >> this is really much more about republican members of congress attacking a democratic president, than it is about any sort of the law. look, the public safety exception is about public safety. what it means is, the interrogators are allowed to ask a suspect questions, if there are immediate public safety risks. are there more bombs out there? are more people about to be killed? is there a ticking time bomb? that's what the government is allowed to ask. they had 16 hours to ask those questions. that's plenty of time. they don't get an unlimited amount of time to interrogate someone who's in custody. what happened here is completely ordinary. it's not going to damage the investigation. and this is how the legal system is supposed to work. >> they argue, and i've heard this from some law enforcement

sources, they argue that 16 hours was not enough time. he was sedated for part of the questioning, he was recovering from serious injuries, he wasn't necessarily lucid. he couldn't speak all that well. what would have been wrong with letting it continue for another day or two? >> well, you know, certainly it's not enough time for the kind of full interrogation you want to do of someone who is accused of such a terrible, terrible crime, and is potentially involved in a broad ranging conspiracy. but that's not the law in the united states. the law in the united states is, when you're in custody, you get your miranda rights. it's the public safety exception that's unusual. it's that 16 hours, it's that period of time when you don't have to give the miranda rights, that's an unusual exception to how the law usually works. but i don't see any justification, frankly, for extending this further.

>> some people have said, the public safety exception could go on for 48 hours, or even longer, that there's no hard and fast deadline for using this public safety exception before theç miranda rights are read. >> well, that's certainly true. the supreme court has never said that there is a hard and fast deadline. and the obama administration has indicated that they believe 48 hours is about the limit. but it's not clear whether that's 48 hours, is 48 hours of questioning, or 48 hours between arrest and miranda warnings. that is about how long, in terms of actual, you know, time on the clock, that went by here, it appears, when he got his actual miranda warnings. but this is not something that is going to hurt the case. tsarnaev is not going to get away with something, because of this. and it really strikes me at this point it's much more politics than law. >> we do know, though, he's

stopped cooperating, stopped providing any information since those miranda rights were read. so i guess that's that. >> and since he got a lawyer. >> and since -- i think he's got three or four lawyers that have been appointed to his case. >> right. >> he's well lawyered up right now. jeffrey, thanks very much. >> indeed. up next, 4,000 cameras monitoring new york city. we're going inside the command center, right at the heart of a massive anti-terrorism operation. alright, bring the model in on the set! work the camera... work it! those hands. oooh la la!

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we're about to get a rare look inside one of the largest anti-terror operations in the world. much of new york city's massive

operation relies on thousands and thousands of cameras on constant lookout for terror threats. cnn's mary snow is joining us now from times square with a closer look. i know you've been investigating. what are you finding out, mary? >> reporter: well, you know, wolf, new yorkers were reminded yesterday that the city remains a potential target. and after the boston marathon bombings, police presence was stepped up in places like times square where we are right now. but other than that, it's not much different than what's going on on any ordinary day. a show of police force that's now a routine drill in new york city in the wake of september 11th. all of it viewed back at police headquarters, part of an anti-terrorism initiative put in place by new york police commissioner, ray kelly. are you aware of any other police department that has this extensive technology? >> no. you know, people understandably

don't see themselves threatened as we do. >> reporter: some 4,000 cameras around the city stream into this command center. some send out an alarm if a bag is left unattended for several minutes. >> if it looks -- continues to look suspicious, the bomb squad would come in. they'd try x-ray it, and if it was still -- no final determination, they may use a disrupter. it's a high-powered water that would disrupt a bomb. >> reporter: times square is a particular concern. millions of people come here every year. in 2010, it was the target of a failed car bomb attempt. the nypd has stressed video surveillance here. but it's also put counterterrorism resources into things you can't see. a thousand officers working counterterrorism. the unit actively monitoring for potential terrorists. >> the lead may come from another law enforcement or intelligence agency. so it might come from some other

part of the country or somewhere around the world. >> reporter: mit silber is the former head of the nypd's counterintelligence unit. in 2007, he wrote a report about the threat of--gro- of home-gro terrorists, citing the biggest threat from homegrown citizenseral callized in the west, warn being muslims. generated controversy. the nypd has come under criticism for monitoring muslims. the department insists everything done is within a legal framework. silber stresses that keeping tabs on potential dangerous behavior can track down a lone wolf. he point out in the case of atm tsarnaev, questions about -- of tamerlan safe? questions about his visit to russia would have put him on the radar. today there have been 16 plots

against new york city. wolf? >> mary snow's at times square. good report. thank you. there's another major story we've been following. the chemical weapons reportedly used by the syrian regime of president bashar al assad. today the president of the united states spoke tough in his first public statement since the defense secretary, chuck hagel's, dire news that there is according to u.s. intelligence evidence that the chemical weapon sarin has been used by the syrian military. listen to this. >> it's obviously horrific as it is when mortars are being fired on civilians and people are being indiscriminately killed. to use potential weapons of mass destruction on civilian populations crosses another line with respect to international norms and international law. and that is going to be a game-changer. we have to act prudently. we have to make these

assessmenassessment s deliberately. i think all of us, not just in the united states but around the world, recognize how we cannot stand by and permit the systematic use of chemicals like chemical weapons -- of weapons like chemical weapons on the population. >> the president said last year the use of chemical weapons would be a "red line" when it comes to intervention in syria. the syrian government is completely denying it, they're blaming the rebels for any use of chemical weapons in the country. up next, will machines like this one make bomb-sniffing dogs obsolete? the closer look at the latest high-tech explosive detectors. you've known? sn we gave people a sticker and had them show us. we learned a lot of us have known someone who's lived well into their 90s. and that's a great thing. but even though we're living longer, one thing that hasn't changed: the official retirement age.

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the 2013 lexus gs. this is the pursuit of perfection. could a bomb-sniffing dog have prevented the boston marathon attack, or could a machine have done so? new technology is pitting highly trained canines against manmade bomb detectors. our pentagon correspondent, barbara starr, takes a closer look. >> reporter: wolf, some new advances are coming in bomb detection technology that experts hope will keep everyone

safe. [ explosion ] >> reporter: from the boston marathon to u.s. troops on patrol in afghanistan, in the life and death challenge to detect bombs. it's a debate over dog versus machine in the search for the best solutions. oak ridge national laboratory is focusing on technology. this bunch of boxes and computer screens is actually a prototype for detecting explosives. >> so what the sensor does is that it combines infrared sources with optics and an infrared detector. >> reporter: simply put, lasers shoot out. the target here, a suitcase, reflects certain colors. advanced computers analyze the colors. and within seconds, detect explosives. this has two critical advantages. the laser finds small amounts of explosives nearly a football field away. and it can be put on a truck,

moving, scanning the crowd like i the marathon. >> you need a device to look out over a large area and so on. it's a difficult question to answer. i would say the technology could do it. >> reporter: scientists say a dog's nose is the best detector. but pentagon officer sergeant sarah legasse says even aldo, her bomb-sniffing partner, has limits. >> some dogs can search a really long time! dogs don't search as long. they get fatigued just like people do. >> reporter: dogs have to get close up to their target. >> if it's a large event like the marathon, you'd have to have numerous teams and just do a grid. get through it. >> reporter: at auburn university, dogs are trained to sniff for vapors. cnn's randi kaye asked if that could have helped in boston. >> reporter: you think if you had a dog in boston they might have detected the suspects before they were able to place those backpacks down? >> had one of our dogs been in place on that corner with those

two guys walking there with those backpacks, i think they would have alerted them. >> reporter: the oak ridge team says its advantage -- in boston it could have identified the precise explosives in seconds. >> if i'm on a bomb squad, i want to know right now is this a dangerous package or not, not have to blow it up unnecessarily or put my life in risk. >> reporter: the oak ridge prototype is just one of many ideas being worked on right now to detect bombs that contain small amounts of explosives. but experts will tell you right now, they will use dogs, machines, technology, anything they can in this deadly challenge. wolf? >> indeed some new technology to help out, to prevent these kinds of disasters. what a week these -- in fact, what these last two weeks have been. if you want to help, here's good advice. you can go to cnn.com/impact, impact your world. you can find out how you can help some of those who have

suffered so, so seriously in boston and elsewhere. cnn.com/impact. you can also go to the onefundboston.org web site if you'd like to help out, as well. thank you very much for watching. i'm wolf blitzer reporting. "erin burnett out front" starts right now. "out front" next. the latest on the investigation into the boston marathon bombings. on this friday night, what we have just learned about how the two suspected bombers learned to make the deadly devices. plus, the mother of the suspects has now left going? what do investigators want to talk about so much with her? we have new information about the wife of tamerlan tsarnaev. we have new video of her coming out of hiding today. first time we've seen her in days. let's go out front.